5-in-1 multifunction air quality monitor can detect CO2, HCHO (formaldehyde), TVOC, temperature and humidity in your living environment. Adopting sensitive sensor, it provides quick and accurate data in the large digital LED screen. Powered by rechargeable lithium battery, it can be widely in home, office, classroom, hotel, car, cellar, greenhouse, warehouse and more! Features: 5 in 1 Function -- CO2/ HCHO (formaldehyde)/ TVOC/ temperature/ humidity tester. Multifunction air quality monitor cares for your health and can be widely used in home, office, market, classroom, hotel, car, cellar, greenhouse, warehouse, lab, etc. 6.5-inch Digital LED Screen -- Displays CO2, air quality level (3-color LED), HCHO (formaldehyde), TVOC (organic gas), temperature, humidity, date, time and battery level. Large digital color screen for easy and clear reading even in dark environments. Air Quality Tester -- Adopts sensitive semiconductor sensor and air convection detection, quickly and accurately detects CO2, formaldehyde and TVOC concentration, ambient temperature and humidity in the living environment. 3-Color LED Indicator, Alarm Buzzer -- Healthy, 400-800PPM (Green); Worse, 801-1800PPM (Yellow); Serious, 1801-5000PPM (Red), at the same time, the alarm will start and last for 10s. Clear at a glance, old people and children can easily recognize too. Rechargeable Battery -- Built-in 1200mAh lithium battery, strong endurance and easy recharging. Simple but stylish appearance, just place it on the desktop, it fits in well with different house styles. Note: 1. Please read the user manual carefully before use. 2. Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding. Specifications: Color: White Material: ABS + Electronic Components Screen: 6.5-inch Digital LED Screen Sensor: Semiconductor Sensor CO2 Detection Range: 400-5000PPM Accuracy: (50PPM+5% Reading) HCHO Detection Range: 0.005-2mg/m TVOC Detection Range: 0.008-2mg/m Temperature Measurement Range: 1~70 Accuracy: 1 (0~65) Humidity Measurement Range: 0-99% RH Accuracy: 2%RH Response Time: 2min Built-in Battery: 3.7V 1200mAh Lithium Battery Work Condition: 0-50, 20-90%RH (Non-condensing) Item Size: 160 * 41 * 90mm / 6.30 * 1.61 * 3.54in Item Weight: 235g / 8.29oz Package Size: 18.5 * 5 * 11.5cm / 7.28 * 1.97 * 4.53in Package Weight: 406g / 14.32oz Package List: 1 * Air Quality Tester 1 * USB Cable 1 * User Manual (English, Japanese, German, French, Spanish, Chinese)